Answer:
(x1, x2, x3) = (-1, 2, 1)
Explanation:
You want the solution to the given system of equations by reduction of the augmented matrix.
Calculator
Many calculators are capable of performing the required reduction of the augmented matrix to reduced row-echelon form. The solution is found in the rightmost column of the result:
(x1, x2, x3) = (-1, 2, 1)
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Additional comment
If you're doing this by hand, it can work well to divide the first two rows by 4. This gives 1s on the diagonal for those rows. These are then used with row operations to eliminate all the off-diagonal elements, leaving reduced row-echelon form.
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